Back to EveryPatent.com
United States Patent | 5,710,799 |
Kobayashi | January 20, 1998 |
A cross polarization interference canceler includes a digital conversion unit for subjecting a demodulated signal of one channel to an analog-to-digital conversion out of two channels which are independently formed, using carriers having the same frequency but having planes of polarization which are mutually orthogonal. An interference canceling unit is provided for canceling interference caused by the other channel of the two channels, with respect to the demodulated signal which is digitally converted by the digital conversion unit. The canceler further includes an integrator for carrying out an integration process with respect to the demodulated signal which is digitally converted by the digital conversion unit so as to provide a negative feedback to the digital conversion unit.
Inventors: | Kobayashi; Kenzo (Kawasaki, JP) |
Assignee: | Fujitsu Limited (Kanagawa, JP) |
Appl. No.: | 190067 |
Filed: | February 1, 1994 |
PCT Filed: | June 1, 1993 |
PCT NO: | PCT/JP93/00735 |
371 Date: | February 1, 1994 |
102(e) Date: | February 1, 1994 |
PCT PUB.NO.: | WO93/25019 |
PCT PUB. Date: | December 9, 1993 |
Jun 01, 1992[JP] | 4-140721 | |
Jun 01, 1992[JP] | 4-140722 | |
Aug 28, 1992[JP] | 4-229693 |
Current U.S. Class: | 375/349; 341/118; 375/346; 455/295; 455/296 |
Intern'l Class: | H04B 001/10 |
Field of Search: | 375/346,349,348 455/295,296,309,312 341/118 |
3963990 | Jun., 1976 | DiFonzo | 325/60. |
3973258 | Aug., 1976 | Cerni | 343/6. |
4438530 | Mar., 1984 | Steinberger | 455/278. |
4479258 | Oct., 1984 | Namiki | 455/295. |
4637067 | Jan., 1987 | Steinberger | 375/346. |
4688235 | Aug., 1987 | Tahara | 375/349. |
4910468 | Mar., 1990 | Ohtsuka | 375/349. |
4914676 | Apr., 1990 | Iwamatsu | 375/349. |
5023620 | Jun., 1991 | Matsuura | 375/349. |
5068667 | Nov., 1991 | Mizoguchi | 455/296. |
Foreign Patent Documents | |||
59-107656 | Jun., 1984 | JP. | |
3254523 | Nov., 1991 | JP. | |
423632 | Jan., 1992 | JP. |